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In which condition is evaporation most likely to be slowest?

Answer and explanation

Correct answer: Cool and humid air

Correct answer: A, cool and humid air. Evaporation is the change of liquid water into water vapour. It becomes faster when water receives heat, when the exposed surface is large, and when moving or dry air can carry away more vapour. Cool air supplies less energy, while humid air is already holding considerable water vapour and has less capacity to accept additional vapour. Therefore the difference between the water surface and the surrounding air is small, so evaporation is slowest. B is wrong because hot, dry air favours rapid evaporation. C is wrong because strong wind removes moist air and dry air accepts more vapour. D is wrong because a large open surface generally increases evaporation. Memory cue: cool plus humid means slow evaporation; heat, dryness and wind usually speed it up.

Related tags

GeographyEvaporationHumidityWater CycleAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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